Typewriting machine



'June 24, 1930. G. G. GOING TYPEWRITING MACHINE Filed May 25, 1929 2 Sheets-Sheet 1 Hmm! N .5ml

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ATTORNEY WWNESSS June 24, 1930. G. G. GOING TYPEWRITING MACHINE `Filed May 23, 1929 2 SheetsQSheet 2 WITNESSES A50 structural features of said machine.

Patented June 24, 1930 UNITED STATES PATENT OFFICE GEORGE G. GOING, OP STANFORD, CONNECTICUT, AssIGNoR To REMINGTON TYPE- WRITER COMPANY, OF ILION, NEW YORK, A CORPORATION OP NEW YORK TYPEWRITING MACHINE Application Elea May 23, 1929. seriai No. 365,425.'

My invention relates to typewriting and like machines and more particularly to the case shift mechanism thereof.

' The `main object of my invention, generally stated, is to provide a noiseless, simple, inexpensive, compact andv highly yeiiicient means for preventing a rebound of the case 'shifted part, 'more particularly in its return to normal position.

V To the above and other ends which will hereinafter appear, my invention consists in the features of construction, arrangements of lparts and combinations of devices set forth in the following description and par'- ticularly pointed out in the appended claims.

In the accompanying drawings, wherein like reference characters designate ycorresponding parts in the different views,- Fig.1 is an enlarged, detail., fragmentary, side elevation, with parts in section, disclosing enough of the typewriting machine to -illustrate my invention in its embodiment therein, said view showing the parts as they appear when the carriage is in the lower case position. Y K' Fig. 2 is an enlarged, detail, fragmentary sectional view of a part of the structure, the. section being taken on the line 2-2 of Fig. 1, and looking in the direction of the arrows at said line.

Fig. 8 is a view that corresponds substantially to Fig. 1 except that the parts are shown as they are disposed when the carriage is shifted to upper case position.

Fig. 4 is an enlarged, detail, fragmentary, transverse sectional view taken on the line 4-4 of Fig.' 3 and looking in the. direction of the arrows at said line.

Fig. 5 is an enlarged, detail, fragmentary, front elevation with parts -in section, showing the central part of the rear casting and parts associated therewith.

I have shown my invention embodied, in the present instance, in a noiseless portable '45 typewriting machine of the character disclosed in'my application Serial #331',534,

filed January 10, 1929, in which the devices of the present invention may be readily incorporated without modifying the existing It should be understood, however, that the inventionyis not restricted in its use to any particular character of typewriting and like machine, but may be employed in such machines generally, wherever found available. In fact the nature of the invention isfsuch as to enable it to be readily incorporated, as an attachment, in typewriting machines that vary materially in character.

In the accompanying drawings I have shown only so much of the typewriting machine as is' necessary to illustrate my present invention in its embodiment therein.

The frame of the machine comprises side plates 1 united'at the rear thereof by a casting 2 which constitutes the back of the machine. Said casting receives pivot screws 3 on which a rock shaft 4 is mounted. Said rock shaft extends from side-tO-side of the machine and has fixed thereto near each end a crank arm 5. A counter balance spring 6 for the case shift mechanism surrounds the rock shaft 4, said spring being secured at one end, as at 7, to the casting 2. The opposite end of the spring isconnected to a collar 8 that is adjustably connected to the rock shaft'4 to adjust the tension of the spring'on the case shifted parts. Each of the parallel arms 5 is pivoted at 9 to a de.- pending bracket arm 10 on the case shift frame which in the present instance is in the nature of a carriage support indicated as a whole by the reference numeral 11.

The carriage support 11 extends from side-to-side of the machine and has oppositely disposed grooved race-ways 12 therein to receive Crossed rollers 13 which also are received in oppositely grooved race-ways 14 in a cross bar 15 of the carriage to which end plates 16 are secured at 17 The carriage, which carries a cylindrical platen 18, is thus mounted to travel from side-tO-side of the machine on the carriage support 11 and is adapted to shift up and down with "said lsupport 'in the case shifting movements of the latter. l

To further guide and control the carriage in its case shiftingv movements I provide a cross bar 19 secured at its ends by screws 20 to the end plates 16 of the carriage. The

`guide solt 21a therein. h

free to travel with the carriage across the.l

rear casting 2 of the frame at about midway in the width of the machine has a guide plate 21 secured thereto by screws 22; the guide plate having a vertically disposed The cross bar 19 is face of the guide plate 21 and also to slide up and down thereon when the carriage receives a case shifting movement. However, in order to retain the rear edge of the bar 19 against the faceplate 21, and thus provide an effective guide and support for the carriage at this point, I provide aclip or guide 24 that extends freely beneath and around the forward edge of the bar 19, as indicated at 25. The rear end of the clip or guide24 is bent at right angles to provide a foot piece 26. This foot piece is connected by a headed screw 27 with a follower block 28 that has a squared extension 29 that projects into the slot 21a of the guide plate 21 and has an up and down sliding movement therein. against a second clip or guide member and holds it firmly against the rear end of the squared part 29 of the follower block,

Y preventing a clamping or binding engagement between the parts 28 and 30 and the guide-plate 21.V A vertically disposed yslot 31 (F ig. 5) is providedl in the clip 30 for the passage of the stem of the screw 27. This is in order to afford a slight up and down adjustment of the clip 30 relatively to the follower block 28 and the clip 24 when the screw 27 is backed up. Vvhen, however, the screw 27 is tightened, the parts 28-29, 24 and 30 are firmly united to move up and down on the guide plate 21 with the car riage in its case shifting movements. The

upper end of the clip 30 is bent forward at 32 to overlap the. cross bar 19 on the carriage and to coact therewith without a binding action, in'order to operatively connect the follower block 28 andthe carriage for case shifting movement together, with out, however, interfering with the travel of the carriage. Y

From the foregoing it will be understood that the devices 24, 30 and 28 by which the carriage is connected to the guide plate 21 effectively hold the cross bar 19 against said guide plate to support and guide the carriage at this point without interfering with the case shifting movement and travel of the carriage, although for the purposes of my present invention the employment of such devices is immaterial.

In accordance with my present invention the right-hand one of the parallel arms 5 is extended at;5L forward of its pivotal connection 9 with the carriage support. The forward end of the arm 5a is pivoted at 33 to a member 34 of a twospart extensible link, the other member of which is designated by the reference numeral 35. These members The head of the screw 27 bears are connected by pin and slot connections 36, 37 for limited relative longitudinal sliding movement one on the other. Washers 38a bear against the heads of the pins 36, and interposed between such washers is an expansion spring 38 which tends to maintain the members of the two-part link separated lengthwise to the fullest extent of their relaj a case shift key 41. The lever 40 is situated preferably at the' right hand side ofthe machine and is provided with an opening 42, the walls ofwhichrengage three sides of a rock shaft 43 which is square in cross section. The lever 40 is formed with an offset ear 44 that underlies the rock shaft 40 and is secured thereto by a headed screw 45. In this manner the lever 40 and therfrock shaft 43 are connected to rock together. Said' rock shaft extends from side-to-side of the machine and is mounted at its ends on pivot screws 46 carried by the side plates l of the frame. At the left hand side of the machine there is provided a second case shift lever or arm 47 provided withy a finger key 48. This lever armf47 is connected to the rock shaft 43 in the `same manner as the lever 40, but terminates at its rear end just in the rear of the rock shaft 43 andhas machine. In the present instance each ofr the stops for limiting the upward motion of the shift frame is designated as a whole by the reference numeral 51. Each of said stops is secured by screws 52 to the casting 2 and comprises a ymetal plate 53 beneath which is a layer ofV felt Y54. The felt is covered by a very thin metal plate 55 bent at its ends, at 56,'around the ends of the plate 53 and the intervening felt54 and securing the latter in place on the stop plate 53. The thin plate 55 constitutes a contact face with which the carriage support 11 coacts to arrest the upward shift movement thereof. The stock from which the plates 53 are made is such'that a slight bend may be given the stops to adjust them. This'construbtion provides for` substantially noiselessly arresting the carriag'ein its upward;

shifting movements, f Y

For arresting the return movement of the carriage screw stops 57 are received in tapped openings in ears 58 on 1oraclets 59 secured by screws 60 to the side plates l of the frame. i The lowei` ends of these brackets 59 are supportedk on the :forwardlyextending arms 61 of the casting 2. Loch nuts 62 may be employed on the screw stops 57 to hold them against accidental displacement from their adjusted positions. As shown in Fig. l thecase shift frame ll bears against the heads of the screw stops 57 and limits the return motion of said frame to normal position. l

It should be understood that so far as the present invention is concerned it is immaterial what character of stops are employed for arresting the case shift frame.

Coming now to the means for preventing a rebound of the shift frame from normal position, which constitutes the important feature of the present inveii'tiomit will be seen that I have provided a detent device in the nature of a lever 63 of thev first order. This lever is carried by and pivoted, at 64, on the case shift lever 40 to have av bodily movement therewith and also have a pivotal movement thereon. The upwardly and rear wardly extending arm of this lever carries a double detent roller 65 pivoted thereon at 66. In some instances, however, it may be found desirable to fix this so-called detent roller against turning movement. This roller is adapted to enter the space between the forwardly and upwardly yinclined part of the carriage support ll and the forward rounded end of the arm 5n when the parts are in the normal position, as shown in Fig. l. The effect of forcingA the roller 65 into the position shown in Fig. l is to exert a wedging action on the parts with which the roller coacts, tending to force thecase shift frame to return to normal position and also maintaining the roller 65 in thev path of movement of the arm 5a, thereby preventing a rebound of thecarriage from normal position, when the detentlever 63 is controlled as hereinafter explained. f

The forward arm of the. detent lever 68 carries an off-set flange 67 that overlies and is adapted to coact with a screw stop 68 adjustable up and down in a vtap :ed opening in a flange 69 projecting from a bracket 70 secured by a screw 7l. to the right-hand side' parts are in the normal position shown in Fig. l, one end of the lever 63-will engage the lined stop 68'and the other end will hold its roller 65 seated against a case shiftable part, as 'pointed out above.. This results in the detent lever being held' against movement around.- its pivot 64 and in holding the case shift frame l1 and the parts carried thereby againstrebouiid. The necessity for preventing such rebound is well undersuood in the artfand need not be elaborated on herein.

When either of the case shift keys il or 4:8 is depressed the rear end of arm40 will be elevated carrying the detent lever up bodily with it and the case shifty frame.

This will result in moving the detent lever away from and out of contact with the stop 66 vso that said lever is free to turnv on its pivot 6l. From a comparison of Figs.l

l and 3 it will be seen that as the carriage is shifted from the lower case Fig. l position, to the upper case Fig. 3 position, the forward end of the arm 5- and the carriage support ll approach each other and close or contract the space inv which the roller 65 is received when the parts are in the lower case position. The effect of this is to pinch' or crowd the roller 65 out from said space ask the parts are shifted to upper case position. This results in turning the 'detent lever 63 around its pivot 64 at. the sametime that said lever 63 is being bodily shifted with the lever Ll0. This turning movement of lever 63 on its pivot 6% is permitted at this time, however, inasmuch as the lever 63 is being moved away from its stop 68 and out of control thereof.l

As the parts return to lower case position the 'space between the forward end of the arm 5a and the case shift frame ll will be.

enlarged; said parts, where the roller 65 coacts therewith, moving away from reach other at this time. Therefore, the roller will continue toenter deeper into`said space as the motion of the parts continues. By the In order to avoid the -necessity of a nice timing of the parts in attaining the above mentioned movements and to assure a releasY` .ing of the detent lever from control of its stop 68 before motion is transmitted to the case shift frame, I prefer toemploy a slight extent of lost motionbetween thelever 40 and the case shift frame. This I do by enlarging the opening vertically in the rear end ofthe lever 40, as indicated at 7 3, where the pivotal connection, at 39, is effected be tween said lever and. the member '3,5 of 'the twopart link. This enables a preliminary lifting of the detent lever 63 out of control llO of the stop 68 at the first portion of the depression of a shift key and before any motion is transmitted to the case shift frame and the parts carried thereby.

It will be understood that the features for preventing rebound of the carriage offer substantially no resistance to the case shifting movement of the carriage to the upper case position, which in itself is an important factor.

From what has been said it will be seen that I have provided simple and effective means for preventing a rebound of the carriage from normal lower case position in returning the carriage to such position, the simple addition of the lever 63 and the stop 68 attaining the ends pointed out.

Various changes in the construction may be made without departing from my invention as it is defined in the accompanying claims. Y

Vhat I claim as new and desire to secure by Letters Patent, is:

1 1.'Case shift mechanism for typewriting and like machines comprising two membersY that have a relative movement one towards the other as the case'shifted part moves away fromnormal position and have a relative movement one away from the other as theshifted part returns to normal position, a detent, and automatically operating controlling means for said detent that enable the detent to be wedged into position between said members as the Vcase shifted part returns to normal position and thereby prevent a rebound of said part from suoli position, and which enables said detent to be pinched out of obstructing position by and from between said members as the case shifted part is moved awa-y from normal position.

2. Case shift vmechanism for typewriting and like'machines comprising two members that have a relative movement one'towards the other as the case shifted part moves awayfrom the normal position and have a Y relative movement one away from theother as the shifted part ieturns to normal position, Va detent, and automatically'operating controlling means for said detent that enable the detent to be wedged into position between said members as the case shifted part returns to normal position and thereby prevent a rebound of said part from such position, and which enables said detent to be 3. Case shift mechanism for typewriting and like machines comprising a key actuated case shift lever, a detent lever pivoted on said case shift lever and 'which normally extends into the path of a case shifted part,

a stop carried by a iXed part of the machine,

and with which said detent lever coacts to prevent a movement thereof around its ful: crum, and a lost motion connection between said case shift lever and the part to be given acase shifting movement in order justable stop carried by a fixed part of the machine and with Which the other arm of said detent lever coacts vwhen the parts are in normal position in order to hold the detent lever in contact with said case shifted part, and means for automatically releasing said detent lever' from control of said stop preliminary to a case shifting movement of said case shifted part. Y

5. Case shift mechanism for typewriting and like machines comprising a key actuated oase shift lever, a detent lever carried by and mounted for pivotal movement on said case shift lever and cooperative with a case shifted part to prevent rebound thereof from normal position, holding VVmeans which in the normal position of the parts prevents said detent lever from receiving a pivotal movement on said key lever and from being displaced from normal effective position, and automatically operating means for rendering said holding means ineffective preliminary to shifting the case shifted part from normal position.

6. Case shift mechanism for typewriting and like machines comprising a key actuated case shift lever, a detent lever carried by and mounted for pivotal movement on said case shift lever and cooperative with a case shifted part to prevent rebound thereof from normal position, a stop which coacts'with said detent lever when the parts are in normal position to prevent a movement of the detent lever around the point of its pivotal `connection with the case shift leverand thereby hold said detent lever in effective engagement with said case shifted part, and

a lost motion connection between said case shift lever vand the case shifted part, whereby a preliminary movement of the case shift lever may be effected independently of the case shifted part in order to release the detent lever from control of said stop.

7. Case kshift mechanism for typewriting and like machinesy comprising a key actuated case shift lever, a detent lever carried by and mounted for pivotal movement on saidcase shift lever and cooperative with a caseshifted part to .prevent rebound thereof 4from normal position, a stop which coacts with said detent lever when the parts are in normal position to prevent a movement of they detent lever around the point of its pivotal connection with the case shift lever and thereby hold said detent lever in effective engagement with said case shifted part, a lost motion connection between said case shift lever and the case shifted part, whereby a preliminary movement of the lcase shift lever may be effected independently of the case shifted part in 'order to release the detent lever from control of said stop, and means for affording an adjustment'of said stop kto different set positions.

8. Case shift mechanism for typewriting and like machines comprising a case shift frame, parallely arms on which said frame is supported and by which it is shifted, the construction and arrangement of the parts being such that the free ends of said arms approach the case shift frame as the latter is moved from normal position, a detent lever carrying an anti-friction roller, a case shiftk key, and automatically actuated controlling means cooperating with said detent lever for wedging the said roller thereon betweeny the case shift frame and one of said parallel links when said frame returns to normal position and for holding the rollers in such wedging position.

9. Case shift mechanism for typewriting `and like machines comprising a case shift frame, parallel arms on which said frame vis supported and by which it is shifted, the construction and arrangement ofthe parts being such that the free ends of said arms approach the case shift frame as the latter is moved from normal position, a detent lever carrying an anti-friction roller, a case shift key, automatically actuated controlling means cooperatingV with said detentlever for wedging the said roller thereon between'L the case shift frame and one of saidparallel links when said frame returns to normal position andfor holding the roller in such wedging positiomand a lost motion connection between said case shift key and frame, whereby said key may receive an.

initial movement independently of the case shift frame in order to release the wedged roller from locked engagement before the case shift frame is shifted.

10. Case shift mechanism for typewriting and like machines comprising a case shift frame, parallel arms on which said frame is supported and by which it is shifted, the construction and `a,rrangement of the parts being such that the free ends of said arms approach the `case shift frame as the latter is moved from normal position, a detent lever carrying an anti-friction roller `shiftable intowedging engagement between said wedging position when thev case shift frame returns to normal position.

1l. Case shift mechanism for typewriting and like machines comprising a case shift frame, parallel arms on which said frame is supported and by which it is shifted, the construction and arrangement ofthe `parts being such that the free ends of said arms approach the case shiftframe as the latter is moved from normal position, a detent lever carrying an antifriction roller shiftable into wedging engagement between said shift frame and one of said arms when the case shift frame returns to normal position, a vcase shift key lever by which said detent lever is carried and on-which it is pivoted, a stop with whichfsaid detent lever coacts in order to force the roller into said wedging position .when the case shift frame returns to normalposition, means kfor affording `an adjustment of said stop to different set` positions, and a lost motion connection between said case shift key lever -and the case shift frame to afford a preliminary independent movement of the case shift-key lever and thereby release the detent lever fromcontrol of its stop and enable the rollerv to pass out of engagingv position.

12. Case shift mechanism for typewriting and like machines comprising a case shift` frame, case shift .keys at opposite sides of the machine, a detent lever carrying anantifriction roller shiftable by said lever into and out of the path of a part which shiftsv with said frame and .which stands in the path thereof when the frame reaches normal position in order to prevent a rebound ofthe frame from normal position, a stop for holding said detent lever in said last mentioned position when the case shift frame `is in normal position, and means controlled by` the actuation of either one or theother of said case shift keys for effecting a release of said detent lever from control of said stop before motion is transmitted to the case shift frame from the actuated case shift key.- r

13. Case shift mechanism for typewriting andlike machines comprising a case shift frame, a key actuated case shift lever, a detent lever carried by and pivoted on said case shift lever for bodily vmovement with and for independent turning movement thereon, and a fixed stop with which said ment thereof on the case shift lever when the vlatter returns to normal position and for holding the detent lever against apart that shifts with the lcase shift frame to prevent the latter from rebounding from normal position. v y

` 14. Case shift mechanism for typewriting and like machines comprising a case shift frame, a' key actuated case shift lever, a detent lever' carried by and pivoted on said case shift lever for bodily movement with and for independent turning movement thereon, a fixed stop with which said detent lever coacts to effect a turning` movement thereof on the case shift lever when the latter returns to normal position and for holding the detent lever against a part that shifts with the case shift vframe to prevent the latter from rebounding from normal position, and a lost motion connection between said case shift lever and the case shift frame to afford a preliminary actuation of the case shift lever and effect a release of the detent lever from the holding action of its stop beframe, a key actuated case'shift lever, a detent lever carried by and pivoted on said case vshift lever for bodily.l movement with and for independent turningA movement thereon, a fixed stop with which said detent lever coacts to effect a turning movement thereof on the case shift lever when the latter returns to normal position'and for hold-v ing the detent lever against a part that shifts with the case shift frame to prevent the latter from rebounding from normal position, a lost motion connection between said case shift lever and the case shift frame to afford la preliminary actuation of the case shift lever and effectA a release of the detent lever from the holding action of its stop before motion is transmitted to the case shift frame from said case vshift lever, an antifriction roller carriedv by said detent lever and constituting the contact portion thereof that prevents rebound of the case shift frame from normal position, and means for affording an adjustment of said stop to different set positions.

1G. Case shift mechanism for typewriting and like machines comprising two members that have a relative movement one towards the other as the case shifted part moves away from normal position and have a relative movement one way from the other as the shifted part returns to normal position, a roller detent that has Aa wedging movement into and out of the spa-ce between said members, a detentV lever by which said roller is carried, and automatically operating means for controlling said lever to hold the detent away from normal position and have a relative movement one away from the other as the shifted partreturns to normal position,

a roller detent that has-'a wedging movement Y into and outy of the space between said members, a detent lever by which said roller is carried, a key actuated case shift lever by which the detent lever is carriedV and on which it is pivoted, and aA stop withv whichY the detent lever coacts when the case shift lframe is in the normal position, said stop at this time preventing a pivotal movement ofthe detent lever and thereby holding the roller locked in engaging position. Y

18. Caseshift mechanism for typewriting and like machines comprising twov members that have a relative movement one towards the other as the case shifted part moves away from normal position and have 'a relative movement one away from the other as the shifted .partreturns to normal position, a roller detent that has a wedging move- `ment into and out of the space between said members, a detent lever by Vwhich-said roller is carried, a key actuated case shift lever by which the detent lever is carriedV and on which it is pivoted, a stop with which the detent lever coacts when the case shift vframe is in the normal position, said stop at this time preventinga pivotal movement of the detent lever and thereby holding the roller loc red in engaging position, and a lost mo.

tion connection between said case shift lever and the case shift frame to ,afford an initial independent movement of said shift lever to free the detent leverfrom control of said i stop before motion is transmitted from said shift lever to said frame. 1

19. Casey shift mechanism for typewriting and like machines comprising two members that have a relative movement one towards the other as the case shifted part moves away from normal position and have a relative movement one away from the other as the shifted part returns to normal position, a roller detent that has la we'dging movement into and out ofthe space between said members, a detentlever by which said roller is carried, a key actuated case shift lever by which the detent'lever is carried and fon Y the case shift frame to aford an initial independent movement of said 'shift lever to li'ree the detent lever from control of said stop before motion is transmitted from said shift lever to said frame, means for affording an adjustment of said stop, a second key actuated case shift lever at the opposite side of the machine, and connections between said case shift levers to cause them to operate in unison, whereby the detent lever is controlled by an actuation of either of said case shift levers.

Signed at Stamford, in the county of Fairfield and State of Connecticut, this 22nd day of May, A. D. 1929.

GEORGE G. GOING. 

